Ruka is een jong meisje wiens ouders gescheiden zijn en wiens vader in een aquarium werkt. Wanneer twee jongens, Umi en Sora, die door doejongs in de zee zijn opgevoed, naar het aquarium worden gebracht, voelt Ruka zich tot hen aangetrokken en begint ze te beseffen dat ze dezelfde soort bovennatuurlijke verbinding met de oceaan heeft als hen. De speciale kracht van Umi en Sora lijkt verband te houden met vreemde gebeurtenissen die steeds vaker voorkomen, zoals het verschijnen van zeedieren ver van hun thuisgebied en het verdwijnen van aquariumdieren over de hele wereld.
Nee, helaas is 海獣の子供 nog niet beschikbaar op Netflix in Nederland.
| Visual Effects | 山本健 | Key Animation |
| Visual Effects | Eri Taguchi | Key Animation |
| Visual Effects | 小西賢一 | Supervising Animation Director |
| Writing | Saku Konohana | Screenplay |
| Visual Effects | Akiko Itagaki | Key Animation |
| Visual Effects | 薮本和彦 | Key Animation |
| Visual Effects | 下司祐也 | Animation Director |
| Visual Effects | 秦綾子 | Animation Director |
| Visual Effects | Tatsuzo Nishita | Key Animation |
| Visual Effects | Kaori Hayashi | Key Animation |
| Visual Effects | 関みなみ | Key Animation |
| Directing | 小西賢一 | Second Unit Director |
| Writing | Daisuke Igarashi | Comic Book |
| Sound | 米津玄師 | Theme Song Performance |
| Visual Effects | 篠田知宏 | Key Animation |
| Sound | 笠松 広司 | Sound Director |
| Visual Effects | 村上泉 | Key Animation |
| Visual Effects | Sanae Shimada | Key Animation |
| Visual Effects | 村上泉 | Animation Director |
| Visual Effects | 下司祐也 | Key Animation |
| Visual Effects | Hirokazu Kojima | Key Animation |
| Visual Effects | Miyuki Ito | Color Designer |
| Visual Effects | Nahoko Machida | Key Animation |
| Visual Effects | 小室有土 | Key Animation |
| Visual Effects | Ryo Imamura | Key Animation |
| Visual Effects | 伊礼えり | Key Animation |
| Visual Effects | 加来哲郎 | Key Animation |
| Visual Effects | 千葉ゆみ | Key Animation |
| Visual Effects | 田中孝弘 | Key Animation |
| Visual Effects | 田津奈々子 | Key Animation |
| Visual Effects | 山本悦子 | Key Animation |
| Visual Effects | Yuta Yokoo | Key Animation |
| Art | Aiwa Narihata | Background Designer |
| Production | Hajime Inoue | Executive Producer |
| Visual Effects | Yuki Oomori | Key Animation |
| Visual Effects | 太田里香 | Key Animation |
| Visual Effects | 亀澤蘭 | Key Animation |
| Art | 伊奈涼子 | Background Designer |
| Production | 田中栄子 | Producer |
| Visual Effects | 秦綾子 | Key Animation |
| Visual Effects | 秋田学 | Key Animation |
| Visual Effects | Ryo Konishi | Key Animation |
| Production | Keiji Kameyama | Executive Producer |
| Visual Effects | 長谷川早紀 | Key Animation |
| Visual Effects | 二松真理 | Key Animation |
| Visual Effects | 杉浦英之 | Key Animation |
| Visual Effects | 刈谷仁美 | Key Animation |
| Visual Effects | 向田隆 | Key Animation |
| Visual Effects | Tatsumori Imoto | Key Animation |
| Visual Effects | Touko Yatabe | Key Animation |
| Visual Effects | Yasuyuki Shimizu | Key Animation |
| Visual Effects | 石川佳代子 | Key Animation |
| Visual Effects | 曽々木安恵 | Key Animation |
| Visual Effects | 松永絵美 | Key Animation |
| Visual Effects | Masahiko Kubo | Key Animation |
| Visual Effects | Yoshiko Hoshi | Key Animation |
| Visual Effects | 青山浩行 | Key Animation |
| Visual Effects | Manami Sugimoto | Key Animation |
| Visual Effects | ちな | Key Animation |
| Production | 田中栄子 | Executive Producer |
| Visual Effects | 八崎健二 | Key Animation |
| Visual Effects | Yuuko Sera | Key Animation |
| Visual Effects | 原科大樹 | Key Animation |
| Production | 久保雅一 | Executive Producer |
| Visual Effects | 久保聡一郎 | Key Animation |
| Visual Effects | 小室裕一郎 | Key Animation |
| Production | 岡本順哉 | Associate Producer |
| Visual Effects | Tomoyo Kamoi | Key Animation |
| Visual Effects | 斉藤拓也 | Key Animation |
| Sound | 山口美香 | Foley Artist |
| Visual Effects | Kenichiro Akimoto | CGI Director |
| Production | 高橋亜希人 | Associate Producer |
| Visual Effects | Yukiko Nagao | Key Animation |
| Visual Effects | 白井孝奈 | Key Animation |
| Visual Effects | 小池沙央里 | Key Animation |
| Visual Effects | 山口賢一 | Key Animation |
| Visual Effects | Shingo Ishikawa | Key Animation |
| Visual Effects | Yosuke Kudo | Key Animation |
| Visual Effects | Miki Kurihara | Key Animation |
| Visual Effects | Shintaro Doge | Key Animation |
| Visual Effects | Shougo Furuya | Key Animation |
| Production | Ayumi Inoguchi | Co-Producer |
| Visual Effects | 小林麻衣子 | Key Animation |
| Visual Effects | 君島繁 | Key Animation |
| Visual Effects | 古川良太 | Key Animation |
| Art | 西村美香 | Background Designer |
| Art | Sara Hasegawa | Background Designer |
| Production | 大田圭二 | Executive Producer |
| Production | Kimihisa Tsutsui | Executive Producer |
| Art | 荒井貞幸 | Background Designer |
| Production | 趙小燕 | Executive Producer |
| Crew | Miyuki Ito | Special Effects |
| Sound | 笠松 広司 | Sound Effects |
| Production | 沢辺伸政 | Co-Producer |
| Editing | 廣瀬清志 | Editor |
| Art | 林孝輔 | Background Designer |
| Visual Effects | Takafumi Ishida | CG Animator |
| Visual Effects | Takanori Nakajima | CG Animator |
| Directing | 渡辺歩 | Director |
| Visual Effects | 小西賢一 | Character Designer |
| Art | 木村真二 | Art Direction |
| Sound | 久石譲 | Original Music Composer |
| Visual Effects | もああん | Key Animation |
| Visual Effects | 묘운 | Key Animation |
